Subject: Re: wierd featurism
To: Darren Reed <>
From: Alfred Perlstein <>
List: tech-kern
Date: 12/21/2001 12:42:24
* Darren Reed <> [011221 06:01] wrote:
> I work some folks who are old vms heads and they were talking, today,
> about per-file flush rates (i'm not sure if it is every N seconds or
> X pages per N seconds).  It sounded wierd enough to be kinda cool in
> some very specific instances.  Is that even remotely possible in unix?

Of course, it would just take a bunch of kernel code to do it. :)

It also depends on which implementation you're looking for.  The
X pages per second sounds trivial by walking the dirty vnode list
every second.  The N seconds one sounds a bit more tricky but you
could do it with the proper data structure.

-Alfred Perlstein []
'Instead of asking why a piece of software is using "1970s technology,"
 start asking why software is ignoring 30 years of accumulated wisdom.'